US1367490A - Automatic alarm for partially-deflated tires - Google Patents

Automatic alarm for partially-deflated tires Download PDF

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Publication number
US1367490A
US1367490A US386292A US38629220A US1367490A US 1367490 A US1367490 A US 1367490A US 386292 A US386292 A US 386292A US 38629220 A US38629220 A US 38629220A US 1367490 A US1367490 A US 1367490A
Authority
US
United States
Prior art keywords
cap
spring
pressure
automatic alarm
cartridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US386292A
Other languages
English (en)
Inventor
Michelin Andre Jules
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR512971A priority Critical patent/FR512971A/fr
Application filed by Individual filed Critical Individual
Priority to US386292A priority patent/US1367490A/en
Priority to DE1920352700D priority patent/DE352700C/de
Application granted granted Critical
Publication of US1367490A publication Critical patent/US1367490A/en
Priority to GB981021A priority patent/GB161177A/en
Priority to FR26771D priority patent/FR26771E/fr
Priority to GB24161/22A priority patent/GB193791A/en
Priority to US595390A priority patent/US1467055A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0401—Signalling devices actuated by tyre pressure mounted on the wheel or tyre characterised by the type of alarm
    • B60C23/0403—Mechanically generated audible signals, e.g. by buzzer or whistle signals

Definitions

  • My present invention relates to improvements in apparatus for warning the chauffeur or driver of a vehicle provided with pneumatic tires when the pressureof the air in the inner tube of said tire falls below normal, and prior to the complete deflation of the tire.
  • it is intended to provide automatically operated apparatus which will advise the chauffeur not when the tire is down, but when the pressure in the tire is so low as to threaten injurious effects at an wheel to which it is attached.
  • the automatic alarm attachment 1s made of generally similar shape and. appearance to the valve casing and attachments used in charging the inner tube with compressed air, and
  • the invention relates primarily to an apparatus arranged to fire a cartridge, which is operated when the pressure in the inner tube falls below a predetermined limit.
  • Fig. 2 is a similar view to Fig. 1, but shows the parts on a larger scale.
  • Fig. 3 is a similar view to Fig. 2, but
  • Fig. 4 shows a section along the line 4-4 of Fig. 2, and looking in the direction of the.
  • A represents the rim carried by the wheel, which is shown of the clencher type, but
  • - may be made of any suitable or convenient type, and is mounted on the wheel in the usual way.
  • the tire C mounted on the rim in the usual way, is provided with the inner tube C. Suitable means, not shown, are provided for inflating this inner tube to the desired pressure.
  • the mm A and flanged portion 5 of the disk B are provided with suitable perforations a and 6 for the insertion therethrough of the stock D, which is provided with a smooth head having an annular shoulder 0? thereon adapted to engage the inner face of the rim.
  • Thisstock is also provided with screw threads d to engage the nut E, which bears against the metal washer E and the rubber gasket E and when the nut E is set up the gasket E is compressed and a secure joint is made which holds the stock in place and also preventsv rattling.
  • This stock is provided with a chamber D in its upper end, in which is mounted the cupshaped cap F, in which is screwed the stem G having the rounded head G, which stem G passes through the opening 03 in the wall 42 of the stock D.
  • the cap F is normailly pressed outward by means of the spring but is held pressed inward by the pneumatic pressure in the inner tube, as shown in Fig. 2, until said pres: sure falls, at which time the spring H. tends tFo force the cap F outward, as indicated in I n the chamber D of the stock D a cap piece M is screwed,which is slotted as atmto receive the hinged catches N which are pivoted to said cap piece by means of the pins 0.
  • This cap piece M is provided with a hollow cylindrical chamber M closed at its upper end by the screw plug P, which plug is preferably provided with a downwardly projecting guide stem I which projects into the interior of the coil spring Q, which spring is mounted in the chamber R" of the firing plunger R.
  • This plunger has a firing point 7 adapted to project down through the opening m in the end of the cap piece M when the cartridge is fired, as will be hereinafter described.
  • the upper portion of the plunger R is provided with an annular rim r adapted to engage the shoulders n of the catches N, which shoulders are normally held in engagement by means of the tension spring S.
  • These two catches have wedge faces near their upper ends, as at n, and above which are holding faces of whose function will be hereinafter de cribed.
  • the carriage holder T Screwed on the lower end of the cap piece M is the carriage holder T, having an annular shoulder t to engage the rim to of the cartridge U, which cartridge may contain black gunpowder or other explosive, and is provided with a suitable primer a, shown in dotted lines in Fig. 2, adapted to be struck by the firing point 1' when the plunger is released.
  • I may provide a lock pin V fitting in the notch d in the stock D, and having its outer end projecting into a notch a in the rim A, as shown in Figs. 2 and 3.
  • the operation of the device is as follows v Assuming the apparatus to be set to operate at a pressure of say two kilograms to the square centimeter, more or less, or approximately fourteen pounds to the inch, more or less, and assuming the pressure in the inner tube to be greater than this amount and the parts to be in the operative or cooked posi tion as shown in Figs. 1 and 2, now suppose the pressure in the inner tube falls from any cause, as from a leak, below the safety limit just referred to. In the first condition, the air pressure will act against the spring impressed cap F and will hold the ca down to the position shown. in Figs. 1 an 2.
  • the fired cartridge may be remove and the parts ma be restored to the initial position by simp y removing the cartridge holder T, as indicated in dotted lines in Fig. 4:, and pushing the firin plunger R back to the initial position,-w ich may be done with any suitable tool, or object, such as a nail, pencil or the like.
  • the spring S will tend to snap the shoulders n of the catches N into engagement with the annular rib 1* on the firing plunger, and the firing plunger will then be held in the cocked position; now afresh cartridge may be inserted in the cartridge holder- T and the cartridge holder again secured in place.
  • An automatic alarm for indicating when the pre sure in the inner tube of a pneumatic tire falls below a predetermined limit comprising a hollow tubular stock projecting through the rim of the wheel, a cup-shaped cap slidably mounted in said stock, a spring normally pressing said cap outward against the action of the pneumatic pressure in the inner tube, a cartridge holder detachably connected to the opposite end of said stock from said cap and adapted to carry a cartrldge, a spring impressed firing plunger provided with oppositely disposed engaging shoulders, and means controlled by the outward movement of said spring impressed cap for releasing said plunger and firing said cartridge when the pneumatic pressure in.
  • the inner tube falls below a predetermined limit, comprising a stem carried by said cap and provided with a rounded laterally projecting head, bent lever arms mounted in said stock and adapted to engage said head when said cap is pressed forward under the action of its spring, the said lever arms being provided with catches normally engaging said shoulders on the firing plunger, and a 10 said catches when said cap moves outward 15 in said stock, substantially as described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Tires In General (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Examining Or Testing Airtightness (AREA)
US386292A 1920-04-03 1920-06-03 Automatic alarm for partially-deflated tires Expired - Lifetime US1367490A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR512971A FR512971A (fr) 1920-04-03 1920-04-03 Avertisseur de dégonflement pour bandages pneumatiques
US386292A US1367490A (en) 1920-04-03 1920-06-03 Automatic alarm for partially-deflated tires
DE1920352700D DE352700C (de) 1920-04-03 1920-09-08 Signalgeber zum Anzeigen der Druckminderung in Luftreifen
GB981021A GB161177A (enExample) 1920-04-03 1921-04-02
FR26771D FR26771E (fr) 1920-04-03 1922-08-26 Avertisseur de dégonflement pour bandages pneumatiques
GB24161/22A GB193791A (en) 1920-04-03 1922-09-06 Improvements in apparatus for giving audible warning of leakage in a pneumatic tyre
US595390A US1467055A (en) 1920-04-03 1922-10-18 Automatic alarm for partially-deflated tires

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR512971T 1920-04-03
US386292A US1367490A (en) 1920-04-03 1920-06-03 Automatic alarm for partially-deflated tires
DE352700T 1920-09-08
GB24161/22A GB193791A (en) 1920-04-03 1922-09-06 Improvements in apparatus for giving audible warning of leakage in a pneumatic tyre
US595390A US1467055A (en) 1920-04-03 1922-10-18 Automatic alarm for partially-deflated tires

Publications (1)

Publication Number Publication Date
US1367490A true US1367490A (en) 1921-02-01

Family

ID=40039872

Family Applications (2)

Application Number Title Priority Date Filing Date
US386292A Expired - Lifetime US1367490A (en) 1920-04-03 1920-06-03 Automatic alarm for partially-deflated tires
US595390A Expired - Lifetime US1467055A (en) 1920-04-03 1922-10-18 Automatic alarm for partially-deflated tires

Family Applications After (1)

Application Number Title Priority Date Filing Date
US595390A Expired - Lifetime US1467055A (en) 1920-04-03 1922-10-18 Automatic alarm for partially-deflated tires

Country Status (4)

Country Link
US (2) US1367490A (enExample)
DE (1) DE352700C (enExample)
FR (2) FR512971A (enExample)
GB (2) GB161177A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460315A (en) * 1947-07-14 1949-02-01 Torrance William Tire pressure alarm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460315A (en) * 1947-07-14 1949-02-01 Torrance William Tire pressure alarm

Also Published As

Publication number Publication date
US1467055A (en) 1923-09-04
FR512971A (fr) 1921-02-04
GB161177A (enExample) 1921-07-28
GB193791A (en) 1923-03-01
DE352700C (de) 1922-05-02
FR26771E (fr) 1924-03-15

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